ss - is used to dump socket statistics, and to investigate sockets
To list all Connections
$ ss
To list Listening and Non-listening Ports
$ ss -a
To list Listening Sockets
$ ss -l
To list all TCP connections
$ ss -t
To list all listening TCP connections
$ ss -lt
To list all UDP connections
$ ss -ua
To list all listening UDP connections
$ ss -lu
To display PID of sockets
$ ss -p
To display summary statistics
$ ss -s
To display IPv4 and IPv6 socket connections
$ ss -4
$ ss -6
To filter connections by port number
$ ss -at '( dport = :22 or sport = :22 )'
$ ss -at '( dport = :80 or sport = :80 )'
$ ss -at '( dport = :ssh or sport = :ssh )'
$ ss -at '( dport = :http or sport = :http )'
regards,
T.Dhanasekar